Fluid pump or motor



Jan. 17, 1956 E. F. PRONDECKI FLUID PUMP OR MOTOR Filed Sept. 21. 1954INVENTOR. Jag/ref flmavfial BY 7 a y 2! United States Patent FLUID PUMP0R MOTOR Eugene F. Prondecki, Turner Falls, Mass.

Application September 21, 1954, Serial No. 457,449

1 Claim. (Cl. 103-425) This invention relates to improvements inapparatus adapted for use as a pump or motor.

The principal object of the invention is the provision of apparatuswhich is constructed and arranged for operation as a fluid pump ormotor.

The apparatus is characterized by a pair of cylindrical members whichare rotatable on parallel axes one of said members being provided with acontinuous rib extending from the periphery thereof and helically andlongitudinally thereof in circumferentially spaced runs and the otherhaving a peripherial groove operatively receiving said rib in relativerotation of the members.

All of the above cited objects I accomplish by means of such structureand relative arrangement of parts thereof, as will fully appear by aperusal of the description below and by various specific features whichwill be here inafter set forth. To these above and other ends and withthe foregoing and various other and ancillary features and advantagesand objects of my invention as will become more readily apparent as thedescription proceeds, my invention consists in certain novel features ofconstruction, in a mode of operation, and in the combinationorganization and arrangement of parts as will be hereinafter moreparticularly pointed out in the claim hereunto annexed and more fullydescribed and referred to in conjunction with the accompanying drawingswherein:

. Fig. 1 is a front elevational view of apparatus embodying the novelfeatures of the invention and;

Figs. 2 and 3 are plan views of the primary and secondary cylinders ofthe apparatus shown in Fig. 1.

In the accompanying drawing, I have illustrated a complete example of aphysical embodiment of the invention in which the parts are combined andarranged in accordance with one mode which I have devised for thepractical application of the principles of the invention.

It will however, be understood that changes and alterations arecontemplated and may be made in these exemplifying drawings andmechanical structures, within the scope of the claim, without departingfrom the principles of the invention.

Referring to the drawings more in detail the invention will be fullydescribed.

A housing is shown at 2 which has upper and lower bores 4 and 6 forcylinders. Said bores are disposed on parallel axes and adjacent sidesintersect, as shown.

End walls such as 8, as shown, in Fig. l, are provided which are securedto forward and rear faces of the housing 2 so as to close opposite endsof the bores 4 and 6. The walls may be secured to the housing by screwssuch as 10 which extend through the walls 8 into tapped holes 12 of thehousing.

A primary cylinder 14 is rotatable in the bore 4 and a secondarycylinder 16 in the bore 6 has a shaft 18 which is rotatable in bearingssuch as 20 of the end walls 8.

The cylinder 16 has on its periphery a continuous vane or rib 22arranged in a plurality of runs 24. The runs project radially outwardly.These runs 24 are arranged in spaced relation circumferentially of thecylinder and extend helically and longitudinally of said cylinder.

The cylinder 14 is provided with a substantially continuous groove 26which is arranged, as shown, with a pair of runs which extend from endto end of the cylinder and helically thereof. Opposite ends of thegroove runs intersect or connect at 26', as shown in Fig. 2.

The cylinder 14 is fitted in the bore 4 for free rotation thereinwithout undesired looseness and likewise the outer side of the rib 22 ofthe cylinder 16 is fitted in the bore 6 for rotation without appreciablelooseness.

The rib and groove of the cylinders are arranged for meshing engagementso that the cylinders are simultaneously rotatable.

Elongated channels 30 and 32 at opposite sides of a vertical planeextending through the axes of rotation of the cylinders open into thebore 6. Opposite ends of the channels are closed by the end Walls 8.Passageways 34 and 36 extend from the channels 30 and 32 and connections38 and 40 are provided for connecting the apparatus in a fluid system.

When the apparatus is used as a pump with cylinder 16 rotatedcounterclockwise from a source of power, such as a motor or the like,connection 38 will be considered as the inlet. The runs 24 of the ribpropel fluid counterclockwise to channel 32 and connection which will bethe outlet.

The runs of the rub and of the groove in the cylinders intermesh in sucha way as to prevent leakage therepast. The cylinder 14 acts as a bufferso that fluid is carried around to channel 32.

When the apparatus is used as a motor, fluid under pressure enteringconnection 38, as an inlet, acts on the runs 24 of the rib 22 of thecylinder 16 to rotate said cylinder counterclockwise. Power may then betaken from the shaft 18 of said cylinder.

The invention may be embodied in other specific forms without departingfrom the essential characteristics thereof. Hence, the presentembodiments are therefore to be considered in all respects merely asbeing illustrative and not as being restrictive, the scope of theinvention being indicated by the appended claim rather than by theforegoing description and all modifications and variations as fallwithin the meaning and purview and range of equivalency of the appendedclaim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the UnitedStates is:

Apparatus of the class described comprising in cornbination, a housingprovided with elongated parallel pri mary and secondary bores havingadjacent intersecting sides providing a connecting slot therebetween,end plates secured to the housing closing opposite ends of said bores, aprimary cylinder journalled in the wall of the primary bore, a secondarycylinder in the secondary bore having shafts at its opposite endsjournalled in said end plates, said housing provided with elongatedchannels in communication with and along the secondary bore at 0ppositesides of said slot and inlet and outlet passageways in communicationwith said channels, said secondary cylinder provided withcircumferentially spaced outward- Patented Jan. 17, 1956 1y extendingribs, adjacent ribs relatively diverging from one to the other end ofthe cylinder, adjacent ends of adjacent ribs at opposite ends of thecylinder being interconnected whereby said ribs form a continuous ribextending back and forth between the ends of the cylinder 5 ondarycylinder for simultaneous relative rotation of said cylinders.

References Cited in the file of this patent UNITED STATES PATENTSRamsden June 9, 1857 Bailey May 24, 1870 Goserud Mar. 24, 1896 ThomasMay 15, 1906 Keene Jan. 4, 1916 Lysholm Oct. 3, 1939 Lysholm June 3,1941 Berck Nov. 28, 1950

